Spring handle for drills



Jan. 1'], 1928.

E. W. STEVENS SPRING HANDLE FOR DRILLS Filed Dec, 8. 1925 jig: IIIIII I I T? I w III/II IIIIIIIMIII :BL

IN VE N TOR 0 WARD W. STEVENS VA/5 ATTORNEY 0C. W/W

Patented Jan. 17, 1928.

UNITED STATES PATENTOFFIICE.

EDWARD W; STEVENS, or DETROIT, mcnronn, Assmnon TO CHICAGO PNEUMATIC TOQL GQMIEANY, on NEW YORK, N. Y., A oon'ronarron on NEW JERSEY.

seams HANDLE none mums.

" Application flied December a; 1925i Serial m; 74,028.

This invention relates. to apparatus forv manually supporting drilling machines. It has: particular. application to drills ofthe. fluid pressurewtype in Whichthe cylinder,

front head, andbackihead are held in assembledrelatiorr by side bolts.

One ohjec'tfofthe invention is to provide apparatus of theitype described Whiohafter.

installing certain parts upon the drilling in machine will enable the quick attachment and detachment of a handle Without the removal of any parts from the drill and Without making any adjustment: thereof. Another objeot is to provide manual sup- ]5 porting apparatus for drills which Will relieve the 0 erator of the shocks incident to theopera'tion of such tools. Still another object is to'provide simple and cheap apparatus which cairbe installed upon new machines or uponoldmachines already in-use.

A stillfurther object is to provide apparatus of this type which-will not interfere Withthe useof the drill upon the usual Still further: 010- cradle V and shell mount. jectsvvillbe apparent fromthe detailed descriptionuwhich follows: g

In order to illustrate the invention concrete embodiments thereof are disclosed in theaccornpanying drawings in which Fig. 1 is a front elevational view;

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Fig. 2 is a side elevational view of the machine shown inFig. 1; and

Fig. 3 is a front elevational view showing a a modification t a5 'The invention isillustrated as applied to a fluid pressurep'ercussive machine of the rock drill type having a cylinder 4 to which the usual front head 5 and back head 6 are clamped by" the side rods 7 which may be arranged to seat in guide projections 4* on the drill cylinder. "In the form of the in vention shown in Figs. 1 and 2 a member 8, shaped to span the cylinder 4, is slidably mounted upon the side rods 7 Whichpass through openings 8? therein. lvilember 8 exopenings: therethrmigh inv alignment with the openings 8 inimember 8. A preferred. A

mannerflof securing yoke memberQ in place lstoahavethe side bolts? of the:- drill pass through openings therein thus clamping the 'member against thebackfl-head 6. Members -8 and 9 serve respectively as support and guide for a handle device having a gr1 part 10 and spaced parallel rods 11 extend ing therefrom. These rods are inserted through the guide openings 9 and there duced ends 11 thereof extend through the openings 8* and aresecuredto the member 8 by suitablemeans such asthenuts 12 which have threaded engagement with the ends of the rods. It will thus be evidentthat the handle device canmove with slide member 8 axially ofthe drill; TOll'lllIlllfllIl the handledevice normally substantially centrally of its rangeof movement and yieldingly to resist such movement in order that the operator may not receive the vibration of the drill, slide member 8 is cushioned against The pre-- movement in bothdirections. ferred means fOI'tlllS purpose comprise-coil sprlngs 13"e1'1c1rcl1ng the side bolts 7 and engaging'on the one hand the'opposite faces of the slide member 8 andon theother hand In mounting the apparatusupon old drillmember 9- againstthe back head 6 and to mount the springs 12and the slide member 8 upon theboltsbetween the front and back heads- Once these parts are installed the handle device comprising the grip 10 and rods 11 may be attached to or detached from the drill at Will in an obvious mannerv i The modifications only slightly from the form shown in Figs. 1 and-2ythe difference being confined to the mounting of the springs 13 used to-resist, the rearward movement ofthe handle de-- shown in Fig, 3 differs vicey10 11 upon the rods ll rather than 7 upon the sidebolts 'f. The slidemernber 9' function in the same manner.

Since the forms of the invention herein shown and described are merelyillustrative, it is to be understood that the invention is not limited to the specific details thereof but covers all forms within the scope of the appended claims.

I claim:

l. The combination With a drillfhaving a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning-saidcylinder and slidably mounted upon said bolts,

means for manually supporting the drill detachably secured to said member, and means yieldingly resisting movementof said member in at least one direction.

2. The combination With a drill havin a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning said cylin- .der and slidably mounted upon said bolts,

means for manually supporting the drill detachably secured to said member, and springs for yieldingly resisting movement of said member.

3. The combination with a drill having a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning said cylinder and slidably mounted upon said bolts, means for manually supporting the drill detachably secured to said member, and coil springs encircling said bolts for yieldingly resisting movement of said member in at least one direction.

4. The combination With a drill having a cylinder, front and back heads, and s1de bolts maintaining said parts in assembled relation. of a member spanning said cylinder and shdably mounted upon said bolts, a handle device secured to said member, guide means for said device at the rear of said drill, and means yieldingly resisting movement of said handle device in at least one cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning said cylinder and slidably mounted upon said bolts, aihandle device comprising a grip part and rods extending therefrom, means securing the free ends of said handle rods to said 7 member, a yoke member secured to the back head of the drill providing guide openings for said handle rods, and coil springs engaging opposite sides of said first-named member yieldingly to resist movement of the same and of the handle device. v

7. The combination with a drill having a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning said cylinder and slidably mounted upon said bolts, a handle device comprising a grip part and rods extending therefrom, means securin the free ends of said handle rods to sai member,.a yoke member clamped against said back head by said bolts and havin guide openings for. said handle rods, sai

members being arranged to dispose said hans dle rods in substantial parallelism With said side bolts, and means for limiting movement of said handle device relative to the drill and for yieldingly resisting such movement.

8. The combination With a drill having a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, of a member spanning said cylin-- der and slidably mounted upon said'bolts, a handle device comprising a grip part and rods extending therefrom, means securing the free ends of said handle rods to said member, a yoke member clamped againstsaid back head by said bolts and having guide openings for said handle rods, said members being arranged to dispose said handle rods substantially in the plane of said side bolts, and means for limiting the axial movement of the handle device relative to the drill and for cushioning such movement comprising coil springs encircling said bolts and engaging opposite sides of said first named member.

9. The, combination with a drill having a cylinder, front and back heads, and side bolts maintaining said parts in assembled relation, members engagmgsaid side bolts at spaced points, one of said members having a fixedpossition and the other beingslidable on said bolts, a handle device fastened to.

said movable member and movably engaging said .fixed member, and spring means.

yieldingly resisting the movement of said device.

10. A handle attachment for drills having front and back heads clamped to the drillv cylinder by side bolts comprising a member adapted to span the drill cylinder and to be slidably mounted on said side rods, springs to encircle the side rods and engage opposite sides of said member, a guide member adapted to be secured to the back head of the drill, and a handle device arranged to be secured to the first named memher and to be guided in limited movement axially of said drill by said guide member. 11. A handle attachment for drillshaving front and back heads clamped to the drill of the drill, and a handle having parallel cylinder by side bolts comprising a mem rods arranged to extend through openings ber adapted to span the drill e linder and in said guide member and to be secured to 10 to be slidnbly mounted on sai side rods, said first-named member.

5 springs to encircle the side rods and engage Signed by me at Detroit, Michigan, this opposite sides of said member, a guide mem- 4th day 01' December, 1925. ber arranged to be secured to the back head L-DVARD STEVENS. 

